It might depend on how strong the concentrate is from the original gallon containers. A gallon of Hyper Dressing and a gallon of Super Degreaser are probably different strengths inside the original gallons. I can't say for sure, but that seems like it would make sense.
Sure for us looking at the bottles 4:1 is 4:1 (one being chemical) and we would think that they should be the same or that we would place 1 amount of chemical in each bottle and four equal amounts of water in each bottle, but I've never seen anything written anywhere, not saying it isn't out there, that tells what the actual strength of the concentrates are. I'm making an assumption here, so take that with a grain of salt.
It certainly doesn't hurt to call Meguiars and to know for certain, but I'd err on the side of the labels of the concentrates and on the labels of the bottles for each respective chemical being correct. That doesn't mean they are, but it's likely they are correct.